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Finding the Fourth Proportional to 877.19, 1,210.55 and 545.36

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Solution

The fourth proportional to 877.19, 1,210.55 and 545.36 is: 752.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.19 : 1,210.55 = 545.36 : x
  2. Step 2: Convert to fraction form
    877.19/1,210.55 = 545.36/x
  3. Step 3: Cross multiply
    877.19x = 1,210.55 × 545.36
  4. Step 4: Simplify right side
    877.19x = 660,176.77
  5. Step 5: Solve for x
    x = 660,176.77/877.19
  6. Step 6: Final answer
    x = 752.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.